Database Administrator

Hive UDF, UDTF, and UDAF This topic describes the basic knowledge of Hive udfs, UDTF, and UDAF. To get started, first create a table "apache_log" in Hive" Create table apachelog (Host STRING,Identity STRING,User STRING,Time STRING,Request

The ORA-00600 kcratr_nab_less_than_odr Solution Today, due to abnormal power outages at the customer site, Oracle database cannot be started again. Let's go up remotely. 1. The database can only be mounted and cannot be started. SQL> select status

MySQL Benchmark Test Tool MySQLSlap instance MySQLSlap is a benchmark tool provided by MySQL. It can be used without installation. The following describes how to use MySQLSlap to perform basic MySQL tests on the server. 1. cd/usr/local/mysql/bin/ Go

CentOS6.5x64 install 64-bit Oracle 11g in silent mode 1. Download the 64-bit Oracle11g source file and upload it to the Linux server. 2. Package installation check and installation: Install the tool using yum: Yum-y install binutils compat-libstdc ++

Data room charging system login BUG, charging system bugDisclaimer: the following content only applies to those who cannot log on multiple times with a single user name at the time of Logon!It is a BUG. In fact, this is not a BUG. Just come up with

[Code implementation] prevents SQL injection solution and SQL Injection Source: PHP development learning portal Address: http://www.phpthinking.com/archives/494 SQL injection is a common issue during program development. It is a security

Use init-connect and binlog in MySQL to track user operations, init-connectbinlog Preface:In the test environment, several important data records are deleted. Because only the public account is deleted in the binlog, you cannot query who logged on

Database Connection Technology-ole db, database connection oledbThe previous blog introduced ODBC and JDBC. This is a brief introduction to ole db. The ODBC summary does not know whether it is not posted on the blog or not on this blog. I will try

We also encountered the Oracle database sequence problem, so we can simply back up and restore the entire database. As follows: Imp/exp Method Table mode backup: Oracle @ sencloudServer: exp dhoffice/dhoffice rows = y indexes = n compress = n buffer

[Translated from mos] modify the dbsnmp password in the DB (10g and 11g) monitored by the db Control, mosdbsnmp How to modify the dbsnmp password in the DB (10g and 11g) monitored by db Control Reference Original:How to Change DBSNMP Password in

Oracle: Only rman backup (data, parameters, logs, and control files are lost) is restored, and mongolermanOracle: Only recovery of rman backup (data, parameters, logs, and control files are lost)Only the backup file recovery process of rman is

VBA: Introduction and examples of dictionaries, and examples of vba dictionariesBasic statement Sub dictest () 'Other detailed explanations for reference: http://club.excelhome.net/thread-868892-1-1.html' dictionary introduction' dictionary object

By using database backup, DBA can create a copy database on the same server or other servers. This replica database can have the same name (copy) or different (clone) from the primary database ). The only difference between Oracle Database copy and

Overview This is to install Oracle 10 on LinuxGThe first part of the main software component guide series. These articles detail all three of Linux's certified English release kits without introducing Asianux) and assume that cheap Intel x86

30 common php code examples for redis operations and phpredis code examples This article mainly introduces 30 common php method code examples for redis operations. In this article, there are actually more than 30 methods that can be used to operate

Oracle is a large database with a C/SClient/Server structure. It is mainly used in the 4GLSQL language and has the advantages of being powerful, simple, and easy to learn. The working process of the C/S structure is: when the client c end) inputs

Bkjia.com comprehensive report: Kannan AnanthanarayananLead the Sybase Data Integration Plan at Sybase, and Ashok Swaminathan is the product management director.Yiwen HuangIs the product manager of Sybase data federation and search. Today,

Recently I encountered a problem with the mysql5 database. Is a standard servlet/tomcat network application that uses mysql databases in the background. The problem is that after one night of standby, the first login on the next morning always fails.

First, create a table emp1 with the same structure and insert some data for it. create table emp1asselect * from emp where deptno = 20; Update part of emp1 data update emp1set sal = sal + 100,comm = nvl(comm,0) + 50

Generally, when our MySQL database slows down, we hope to make it faster, stronger, bigger, and better through all our efforts! So what are the methods? Don't worry. I will show you one by one how to achieve these beautiful wishes. Reading this